Python，循环 - 代码结果与预期结果不匹配

Question

I am trying to make a program for basic addition(+) on mathematics. My code is as follows:

   import random

   Totalrounds = input("Input how many rounds you want try? ")

   answerlist = list()


   for i in range(0, int(Totalrounds)):
        numb1 = random.randint(0,9)
        numb2 = random.randint(0,9)            
        print(numb1, "+" , numb2,)
        Answer = int(input("Your answer is? " ))

        if Answer == numb1 + numb2 :
              print("Your answer is correct")
              print()
        else:
              print("Your answer is wrong")
              print("the right answer is ", numb1 + numb2)
              print()  

        answerlist.append(Answer)

   #Result

   print("this is your Answersheet from" ,Totalrounds, "question")

   for i in range(0, len(answerlist)):
      if answerlist[i] == numb1 + numb2 :
         Result1 = "correct"
         print (numb1, "+" , numb2, "=" ,answerlist[i], Result1 ,)
      else:
         Result1 = "wrong"
         print (numb1, "+" , numb2, "=" ,answerlist[i], Result1 ,)

If I put totalrounds around 5, on #result print, the question 1 - 4 will have different number from upper list. can anyone tell me what I did wrong in this code and what can i do to make it same like upper list question? question = numb1 "+" numb2

thank you for you help

Answer 1

There are several things that are problematic or style related in your code.

In the second for loop you try to access the numb1 / numb2 but they are not relevant because each iteration of the first for loop you change them so to overcome this issue you need to store them as well.

There is no need to set range to start from 0, this is the default value.

When initiating a list there is no need to do list() just [] is enough.

a correction to your code is as follows:

import random

Totalrounds = input("Input how many rounds you want try? ")

answerlist = []
numb1_list = []
numb2_list = []


for i in range(int(Totalrounds)):
    numb1 = random.randint(0,9)
    numb1_list.append(numb1)
    numb2 = random.randint(0,9)
    numb2_list.append(numb2)
    print(numb1, "+" , numb2,)
    Answer = int(input("Your answer is? " ))
    if Answer == numb1 + numb2 :
          print("Your answer is correct")
          print()
    else:
          print("Your answer is wrong")
          print("the right answer is ", numb1 + numb2)
          print()

    answerlist.append(Answer)

#Result

print("this is your Answersheet from" ,Totalrounds, "question")

for i in range(len(answerlist)):
  if answerlist[i] == numb1_list[i] + numb2_list[i] :
     Result1 = "correct"
     print (numb1_list[i], "+" , numb2_list[i], "=" ,answerlist[i], Result1 ,)
  else:
     Result1 = "wrong"
     print (numb1_list[i], "+" , numb2_list[i], "=" ,answerlist[i], Result1 ,)

Answer 2

You store the values of the answers in answerlist but you only store the most recent values of numb1 and numb2 so they are always printed as the same.

If you want to print all the previous questions you should store them in a list too.

Then change the print statement at the end

print (numb1list[i], "+", numb2list[i], "=",answerlist[i], Result1)